The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 2002
Filed:
May. 05, 1999
Applicant:
Inventor:
Paolo Cuzzato, Treviso, IT;
Assignee:
Ausimont S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 9/08 ; C01F 7/50 ; B01J 2/712 ;
U.S. Cl.
CPC ...
C01B 9/08 ; C01F 7/50 ; B01J 2/712 ;
Abstract
Process for preparing aluminum fluoride which comprises fluorination of alumina with gaseous HF, characterized in that the alumina is fluorinated with HF at an initial temperature lower than 300° C., the temperature is raised with a temperature gradient ≦100° C./hour up to the final temperature >320° C. and <450° C., fluorination is continued at the final temperature until feeding a HF molar amount at least equal to the stoichiometric with respect to the alumina, fluorination being carried out until a fluorinated alumina with a fluorine content not lower than 95% of the stoichiometric is obtained.